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8159 = 41199
BaseRepresentation
bin1111111011111
3102012012
41333133
5230114
6101435
732534
oct17737
912165
108159
116148
12487b
133938
142d8b
15263e
hex1fdf

8159 has 4 divisors (see below), whose sum is σ = 8400. Its totient is φ = 7920.

The previous prime is 8147. The next prime is 8161. The reversal of 8159 is 9518.

8159 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9518 = 24759.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2k-8159 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 8159.

It is not an unprimeable number, because it can be changed into a prime (8179) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 59 + ... + 140.

It is an arithmetic number, because the mean of its divisors is an integer number (2100).

28159 is an apocalyptic number.

8159 is a deficient number, since it is larger than the sum of its proper divisors (241).

8159 is a wasteful number, since it uses less digits than its factorization.

8159 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 240.

The product of its digits is 360, while the sum is 23.

The square root of 8159 is about 90.3271830625. The cubic root of 8159 is about 20.1316317534.

The spelling of 8159 in words is "eight thousand, one hundred fifty-nine".

Divisors: 1 41 199 8159